Engineered for extreme torque densities, dynamic pressure operations, and high-duty cycles.
Founded in 1955, Xi’an Lite SIMO Motor Co., Ltd stands as a pillar of China's electrical machinery industry. With over 60 years of dedicated experience in motor design and fabrication, SIMO has evolved into a comprehensive manufacturer and global service provider. We specialize in producing large, medium-sized, high and low voltage AC/DC motors, synchronous motors, and explosion-proof motors.
Our expansive industrial ecosystem integrates design, manufacturing, mechanical processing, mold fabrication, assembly, and quality assurance. As a TOP manufacturer in China's motor industry, SIMO has consistently expanded its production capacity and technical horizon, establishing a standard of reliability recognized worldwide.
Tracing SIMO's 60+ year trajectory from a state-owned facility to a leading global supplier of heavy industrial electric motors.
SIMO Motor was established under state guidance, starting production of fundamental industrial electric drives.
Relocated to a dedicated, expanded facility in the historical industrial hub of Xi'an to scale up manufacturing capacity.
Reorganized and officially renamed as Xi'an Motor Factory following series acquisitions and system integration.
Transitioned from a state-owned enterprise to a limited liability structure, paving the way for international partnerships.
Established the SIMO Motor Group, integrating 14 specialized subsidiaries to cover the entire motor supply chain.
Moved to a high-tech industrial park, installing modern automated tooling, VPI varnishing systems, and CNC machining centers.
Deepening R&D in green technologies (IE4/IE5 efficiency) and custom explosion-proof variable-frequency drives for industrial applications.
Understanding the engineering demands of electric motors when coupled with high-flow hydraulic pump stations.
Large hydraulic pumps, such as axial piston and heavy gear pumps, frequently start under full load. Our YE4 and YR wound rotor motors deliver the high starting torque required to overcome system inertia and fluid pressure gradients without causing severe voltage sags.
Hydraulic flow control depends on precise pump speed control. The YVFE3 and YVFE4 variable frequency drive (VFD) motors feature high-grade insulation (Class H or F) and insulated non-drive end bearings to prevent damage from high-frequency shaft currents.
In chemical plants, oil refineries, and offshore platforms, hydraulic units operate in flammable environments. Our YBX3, YBX4, and YBX5 explosion-proof motors are certified to Ex d IIA, IIB, and IIC standards, providing robust protection in hazardous areas.
A breakdown of our flagship models designed to drive high-capacity hydraulic pump systems, air compressors, and heavy mechanical drives:
| Motor Series | Voltage & Power Range | Key Advantage | Standard Compliance | Target Hydraulic Application |
|---|---|---|---|---|
| YE4 / YE5 Series | 380V - 1140V | 0.35kW - 1000kW | Ultra-Premium Efficiency (IE4/IE5) | IEC 60034-30 / GB18613 | Industrial continuous-duty power packs |
| YVFE3 / YVFE4 Series | 380V - 10kV | Up to 2500kW | Wide constant torque frequency range | VFD Harmonics Resistant | Proportional variable displacement pump drives |
| YBX3 / YBX4 / YBX5 | 380V - 10kV | 0.55kW - 2000kW | Flameproof Enclosure (Zone 1/Zone 2) | ATEX, IECEx, CNEx | Offshore oil rigs & refinery hydraulic pumps |
| YR / YRKK / YRKS | 6kV - 10kV | 220kW - 25,000kW | Wound Rotor / High starting torque | ISO 9001 / GOST | Heavy mine ventilation & mining hydraulics |
| TDMK / T Series | 3kV - 10kV | 250kW - 20,000kW | Large Synchronous / Power factor correction | IEEE / NEMA Standard | High-pressure water hydraulics, ball mills |
For global procurement managers, shipping speed, design flexibility, and cost control are critical. SIMO operates 3 modern production bases equipped with 1,172 sets of high-precision machinery, including automated stator winding lines, vacuum pressure impregnation (VPI) equipment, and advanced CNC rotor balancing rigs.
By producing components internally—including molds, shafts, and end-shields—we minimize relying on external supply chains. This vertically integrated manufacturing model ensures that custom flange mountings, special shaft extensions, and distinct mounting arrangements (IM B3, B35, V1) can be fabricated quickly and cost-effectively, maintaining our competitive pricing.
Every SIMO motor undergoes rigorous testing in our certified laboratories before shipment, ensuring compliance with global industrial standards.
Our quality management system is fully certified to ISO9001. Depending on your destination country and project specifications, we supply motors with international certifications, including:
By providing verified test reports for vibration, noise, winding resistance, and load efficiency, we ensure your engineering team has the necessary documentation for standard audits and site compliance inspections.
Where efficiency meets intelligence: SIMO's vision for smart, decarbonized industrial motor drives.
We are expanding our YE5 series to cover a broader range of low- and high-voltage applications. Transitioning to IE5 can reduce energy losses by up to 30% compared to IE3 models, helping operations lower energy consumption and lower carbon emissions.
Next-generation SIMO motors feature integrated vibration and temperature sensors. By streaming real-time operational data to predictive maintenance platforms, operators can identify potential bearing fatigue or winding overheating before a shutdown occurs.
To withstand chemical exposure in heavy industrial zones, our motors feature advanced epoxy polyurethane coatings and standard IP55/IP56 enclosures, protecting core laminations and electrical terminals from moisture and dust.
Answers to common engineering and procurement questions regarding low/high-voltage industrial drives.
The primary difference is efficiency and thermal management. YE5 motors conform to the IE5 ultra-premium efficiency rating. Operating at higher efficiency reduces internal heat dissipation, which helps extend the life of winding insulation and bearings. In continuous-duty operations (24/7), the energy savings of a YE5 motor can offset its initial cost within a short period, while also helping lower overall carbon emissions.
For high-power applications (typically above 350kW), operating at low voltage (380V/690V) requires very high current levels. This demands thick, heavy power cables and results in significant I²R transmission losses. Using high-voltage motors (such as YKK, YKS, or YRKK 6kV/10kV series) reduces operating current, minimizes transmission losses, simplifies cable sizing, and improves the electrical efficiency of the plant's distribution network.
High-frequency voltage pulses from VFD switchgear can induce voltages along the motor shaft. If left ungrounded, these currents can discharge through the bearings, causing micro-pitting and premature bearing failure. SIMO's YVFE3 and YVFE4 VFD motors mitigate this by installing insulated non-drive end (NDE) bearings, grounding brushes, and utilizing Class H corona-resistant magnet wire to protect the windings.
You must verify the zone classification (Zone 1 or Zone 2), gas group (IIA, IIB, or IIC), and temperature class (e.g., T4). Our YBX3, YBX4, and YBX5 explosion-proof motors feature robust, heavy flameproof cast-iron frames designed to contain any internal explosion, preventing sparks or flame propagation from igniting volatile external gases.
Yes. TDMK and T series synchronous motors can run at a leading power factor, helping offset the lagging power factor caused by multiple induction motors in the facility. This helps improve the plant's overall power factor, reduces reactive power charges from utilities, and enhances the voltage stability of your grid.
Explore our specialized high-voltage asynchronous motors, synchronous machinery, and starter controllers.
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